When the vehicle is being driven at a speed of 5 km/h (3 mph) or more
3 seconds after the ignition switch is turned to ON, a signal from the combination
meter assembly indicating an abnormal vehicle speed tolerance is detected
by the forward recognition camera for 50 seconds or more.

Meter/gauge system

Combination meter assembly

Forward recognition camera

CAUTION / NOTICE / HINT

NOTICE:

When replacing the forward recognition camera, always replace it with
a new one. If a forward recognition camera which was installed to another
vehicle is used, the information stored in the forward recognition camera
will not match the information from the vehicle. As a result, a DTC may
be stored.

If the forward recognition camera has been replaced with a new one,
be sure to perform forward recognition camera learning.

Click here

First check the CAN communication system by following How to Proceed
with Troubleshooting. After checking that there are no malfunctions in the
CAN communication system, proceed with troubleshooting.

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When replacing the combination meter assembly, always replace it with
a new one. If a combination meter assembly which was installed to another
vehicle is used, the information stored in it will not match the information
from the vehicle and a DTC may be stored.

PROCEDURE

1.

CHECK FOR DTCs (METER / GAUGE SYSTEM)

HINT:

Lane departure alert system DTC C1AA2 may be stored due to a malfunction in the
meter/gauge system. Therefore it is necessary to check for and troubleshoot meter/gauge
system DTCs first.

(a) Check for DTCs.

Body Electrical > Combination Meter > Trouble Codes

Result

Proceed to

Meter/gauge system DTCs are not output

A

Meter/gauge system DTCs are output

B

B

CHECK METER / GAUGE SYSTEM

A

2.

CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

(e) Clear the DTCs.

Click here

(f) Make sure that the DTC detection conditions are met.

HINT:

If the following procedure is not performed, the previously output DTC cannot
be detected.

(g) Check for DTCs.

Click here

Result

Proceed to

DTC C1AA2 is output

A

DTC C1AA2 is not output

B

B

USE SIMULATION METHOD TO CHECK

A

3.

REPLACE FORWARD RECOGNITION CAMERA

(a) Replace the forward recognition camera.

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(b) Adjust the forward recognition camera.

Click here

NEXT

4.

CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

(e) Clear the DTCs.

Click here

(f) Make sure that the DTC detection conditions are met.

HINT:

If the following procedure is not performed, the previously output DTC cannot
be detected.

Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL BRAKE BOOSTER ACCUMULATOR ASSEMBLY
(a) Place the brake booster pump in a vise with a cloth.
(b) Install the brake booster accumulator pipe, compression spring and a new
O-ring.
NOTICE:
Ensure that no foreign matter enters the pump.
(c) Using a socket wrench ...

Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
When troubleshooting a vehicle with the diagnosis system, the only difference
from the usual troubleshooting procedure is connecting the Techstream to the vehicle
and reading various data output from the vehicle's skid control ECU (brake actuator
assembly) ...